And now I'm going to go back to the incubating group and change it to number two and the infected group and change it to number three. I'm going to change this group number to group number four for the spiral particles. I'm also going to drag this group down to the bottom just so I can tell easier which number is what just by looking at it. The spiral particles are currently set to group number two. Our initial particles are set to group number one, which is good, that's what I want. So I just want to make sure that those numbers are correct right now. Once we get into Redshift, we're going to use our group IDs in order to control which shaders are applied to which particles. The last thing we need to do before caching is go through and adjust our group IDs.
We'll have quite a bit more control over the trails within Redshift, so we don't necessarily need to set everything within X-Particles in order to gain the access to that data. So if I select the trail and then come down to the object tab and make sure that the trail color mode is set to particle color, we're good to go. For right now, we're going to pretty much leave these as is, I just want to make sure that these trails are taking on the particle color and not the pervert text color. Now, there's a bunch of different ways to render trails out. Another thing we need to check on is our trails. So we don't need to change anything about those right now. So as the particles age, they're going to fade and kind of die off and we can actually access that data directly in Redshift. The infected particles, we actually will be changing the color based on the age data. The incubating particles, we're not going to be changing color based on any data. And then the affected particles, I'm going to leave as is. We're just going to change that color to something a little bit more pleasing and easy to see. So right now, if we zoom in over here, we can see that our incubation particles are this blue color. We're not going to have to change much here in X-Particles because we're going to change most of those color values within Redshift. And get those to where they're starting to get affected. Now, for the incubating and infecting particles, let's go and play further through. This allows us to have more freedom at render time to change the colors and change the value of these particles as we need to and that way, we don't have to rerun the simulation and cache out again. That's exactly what we want, so I'm going to go and change this parameter back to a black to white gradient and the reason I'm doing that again is so that we can map these particles across a new ramp in the Redshift nodes. Let's go and play that back and now you can see our particles are changing color based on how fast they're moving through our scene. I'm going to leave it at auto for now and see what it looks like. And then, down here under the gradient parameter, we can either set this to auto where it auto detects how fast he particles are moving, or we can set it manually using the minimum and maximum values. I might go and change the gradient color right now just so that we can see what's actually happening. We're going to do that by going to the spiral group, changing the color mode from single color to gradient parameter and then making sure that that gradient parameter is set to speed. Unfortunately, Redshift does not have access to this data, so we need to go and set this up within X-Particles. What I want our spiral particles to do is have their color controlled by the speed that they're moving at. The next thing we want to do is check on our spiral particles. So now each one of these particles is pulling from a random location along that gradient. So if we come up to our initial group, we change the color mode to gradient random, and then set the gradient color to a black to white ramp. Let me go ahead and just walk through that one more time. So I'm going to go and play back my scene a little bit and right now, we had already set up our initial particles to have this random black and white gradient. The first thing we want to do is make sure that our particles have the right color of data being passed through.
Once we've made these decisions, we can go and cache out the whole simulation to make sure that we have smooth playback and can scrub through the timeline as we're doing our loop development. Now that we've set up most of our simulation, let's take a minute to decide on what data we want to pass through to Redshift before we get into shading.
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